CAT SX & Cat SXII – Diff Rebuilding Guide

Written by Chris
Long for JE Spares
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1. Remove the differential
   from your model.

1. Disassemble your
   differential completely and place all the parts on your work surface
   ready for maintenance. In the photo you can see that we have used a
   pair of tweezers for removing the c-clip (model specific). These are
   modified tweezers that have been sharpened on the ends to fit into the
   c-clip holes and then bent slightly to reach inside the diff cup.

1. Clean all the parts of
   your differential. Wipe clean all oil, grease and dirt from the parts,
   a stiff brush comes in handy for the gear.

1. Once all of the parts have been
   cleaned, you can now begin rebuilding the differential. Follow your
   manual for the rebuild process as it varies from car to car. Tech
   Tip: On the Schumacher CAT SX, the 2 thrust washers on the diff
   screw are marginally different in size so check them with some
   calipers or an accurate measuring device.

Team Associated's Black Grease for
thrust bearing

1. While rebuilding the
   diff, remember the modified tweezers tip we showed you earlier in the
   guide.

1. Team Associated's
   Stealth grease works well on the diff plates. Use a similar amount as
   shown in the photos below.

Team Associated's Stealth for diff
plates

1. Once the diff has been
   assembled, you can use two tools as shown in the photo below to check
   the tightness of the differential by turning each driver in a
   different direction.

1. Re-install the
   differential into your car and you're done!

Source: Chris Long